Sarasota County - County workers are blaming a combination of factors for the deaths of thousands of fish in a pond off Clark Road this week. Heat, heavy rain, stormwater runoff and bird droppings depleted the oxygen level in Mirror Lake, near the southeast corner of Clark and Beneva roads, according to the county. Workers at nearby offices began to notice the dead fish Monday, but the majority turned up dead Tuesday, according to SNN Local News, Herald Tribune and World Chaos